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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 3 |
| 2 | 3 |
| 3 | 7 |
| 4 | 5 |
| 5 | 31 |
| 6 | 7 |
| 7 | 127 |
| 8 | 17 |
| 9 | 73 |
| 10 | 31 |
| 11 | 2047 |
| 12 | 21 |
| 13 | 8191 |
| 14 | 127 |
| 15 | 443 |
| 16 | 257 |
| 17 | 131071 |
| 18 | 73 |
| 19 | 524287 |
| 20 | 341 |
| 21 | 7003 |
| 22 | 2047 |
| 23 | 8388607 |
| 24 | 273 |
| 25 | 1082401 |
| 26 | 8191 |
| 27 | 262657 |
| 28 | 5461 |
| 29 | 536870911 |
| 30 | 443 |
| 31 | 2147483647 |
| 32 | 65537 |
| 33 | 1797851 |
| 34 | 131071 |
| 35 | 26181091 |
| 36 | 4161 |
| 37 | 137438953471 |
| 38 | 524287 |
[2,3,3,7,5,31,7,127,17,73,31,2047,21,8191,127,443, 257,131071,73,524287,341,7003,2047,8388607,273, 1082401,8191,262657,5461,536870911,443,2147483647, 65537,1797851,131071,26181091,4161,137438953471, 524287] |